An aqueduct was a construction that controled the flow of water.
The colonists of Tau Cygna V built an aqueduct for ninety years. It was destroyed by Lieutenant Commander Data who tried to convince the colonists leave their planet due to an impending confrontation with the Sheliak. (TNG: "The Ensigns of Command")
Bajor was famous for its aqueducts. Unfortunately, they were damaged by the Cardassians during the Occupation. In 2369, the USS Enterprise-D arrived at Deep Space 9 to assist in their reconstruction. (TNG: "Birthright, Part I")